nomadseason

December Weather in Saint George, United States

Last updated: June 24, 2025

In December, the average temperature in Saint George, United States hovers around 0°C (32°F). However, temperatures can fluctuate dramatically, with minimums plummeting to -20°C (-4°F) and maximums reaching a pleasant 15°C (60°F). Expect around 127 mm (5.0 in) of precipitation spread across 11 days, accompanied by an average humidity of 81%—perfect for cozy indoor activities!

December Temperature in Saint George

In December in Saint George, the average temperature is 0°C (32°F). Maximums can reach 15°C (60°F), and minimums can be as low as -20°C (-4°F). Travelers should prepare for a wide range of temperatures during this time, ensuring they have both warm clothing and options for milder weather.

December Weather in Saint George: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Saint George, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint George, December typically has an average temperature of 0°C (32°F), with highs reaching up to 15°C (60°F) and lows dropping to around -20°C (-4°F).
JanFebMarAprMayJunJulAugSepOctNovDec282934435262676862534132
Data source: Temperature data for Saint George generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Saint George

In Saint George in December, the precipitation amount is 127 mm (5.0 in), occurring over 11 days.

December Precipitation Trends in Saint George

The chart displays monthly precipitation patterns in Saint George, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Saint George, December typically receives around 127 mm (5.0 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec94967813383721018085133116127
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Saint George

In Saint George in December, humidity is 81%. With an average temperature of 0°C (32°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less enjoyable and requiring extra layers to stay warm and dry while traveling.

December Average Humidity in Saint George

This chart illustrates the average monthly humidity levels in Saint George, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Saint George is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%86%84%79%79%86%85%83%80%77%80%81%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Saint George

In Saint George in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Saint George, you can visit Hourly UV Index in Saint George.

Maximum UV Index Levels in Saint George for December

The chart shows the monthly maximum UV Index (UVI) for Saint George in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Saint George typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2457910987532
Data source: Saint George December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How December Weather in Saint George Compares to Other Months

Weather in Saint George varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Saint George, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Saint George, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (28°F)94 mm (3.7 inches)85%low
February Weather-2°C (29°F)96 mm (3.8 inches)86%moderate
March Weather1°C (34°F)78 mm (3.1 inches)84%moderate
April Weather6°C (44°F)133 mm (5.2 inches)79%high
May Weather11°C (53°F)83 mm (3.3 inches)79%very high
June Weather17°C (62°F)72 mm (2.8 inches)86%very high
July Weather20°C (68°F)101 mm (4.0 inches)85%very high
August Weather20°C (68°F)80 mm (3.1 inches)83%very high
September Weather17°C (62°F)85 mm (3.3 inches)80%high
October Weather12°C (53°F)133 mm (5.2 inches)77%moderate
November Weather5°C (41°F)116 mm (4.6 inches)80%moderate
December Weather0°C (32°F)127 mm (5.0 inches)81%low

Compare Saint George's Climate with Cities Worldwide